As part of ATOMIC, NOAA's R/V Ronald H Brown will be deployed during EUREC⁴A between 6 January and 13 February. The R/V Ronald H. Brown will focus on air-sea interaction with an emphasis on the mesoscale, primarily operating in the area between the R/V Meteor (upwind of Barbados) and the NTAS buoy near 51 ºW. Presently it is scheduled to leave Barbados on 6 January for its first leg, initially heading to the NTAS buoy region. During the transit to NTAS, 2 wavegliders and 6 SWIFTS will be deployed. Brown will spend ~ 6 days in the vicinity of the NTAS buoy to replace the buoy; make upwind in situ and remote measurements of boundary layer, aerosol, and cloud properties; and conduct UAV flights. Once buoy operations are complete, Brown will work further west in the Tradewind Alley upwind of EUREC⁴A platforms and in coordination with the NOAA WP-3D. On Jan. 24, Brown will pick up SWIFTS and transit to ~20 nm upwind of BCO for an inter-comparison with the observatory and other platforms in the area. Brown will return to Bridgetown on Jan. 26 for a brief inport and open house. Leg 2 will begin on 28 January and will focus on measurements in a region mid-way between the HALO circle and NTAS thus serving as an upwind point of observation for the EUREC⁴A campaign. The R/V Ronald H. Brown will conclude its mission upon returning to Barbados on 13 February.